Signal apparatus.



E. W. WOOLLEY. w

SIGNAL APPARATUS.

APPLICATION FILED SEPT-20, I913.

Patented June 20, 191%.

- SIGNAL APPARATUS.

memes.

Specification of Letters Patent.

Patented June 20, 1913.

Continuation of applications Serial No. 510,124, filed July 28, 1909, and Serial No. 524,847, filed November 13, 1909. This application filed September 20, 1913. Serial N0.'790,844. I

To all whom it may concern Be it known that I, EDWARD W. WOOLLEY, a citizen of the United States, and a resident of Jersey City, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Signal Apparatus, of which the following is a specification.

This invention relates to a signal apparatus, which is particularly applicable where a predetermined fluid pressure is to be maintained constant. The apparatus signals either the increase or reduction of said predetermined pressure, and is a continuation of applications and Letters Patent as fol-' lows: Air brake, filed July 28, 1909, Serial Number 510,124, Patent No. 1,118,994, dated Dec. 1, 1914. Clutch and regulating mechanism, filed Nov. 13, 1909, Serial Number 527,847, Patent No. 1,157,275, dated Oct. 19, 1915.

The present application is also an improvement on my application and Letters Patent for air brakes and appurtenances for vehicles, filed February 19, 1910, Serial Number 544,7 35, Patent No. 1,050,414, dated January 14, 191

In the accompanying drawings Figure 1 represents a front elevation of the invention, Fig. 2 shows atop plan View of Fig. 1, Fig. 3 is a section of Fig. 2 on the line 3, 3 and Fig. 4 represents a section of Fig. 1 on the line 4, 4.

The apparatus is shown to comprise the cylinder 20 with an opening inthe lower end of the wall. thereof for the inlet piping 211 A longitudinal discharge port 22 with the upper branch discharge port 23 and the lower branch discharge port 24 is formed in the wall of said cylinder adjacent to the upper portion thereof. A pressure gage 28 and valve 29 are connected to the piping 21. Piping 30 extends from the port 22 and has connected therewith the valve 31 and whistle 32.

The upper end of the cylinder 20 is shown with the top cylinder head 35, fitted with the oilcup 36 and the stufing box with the gland 37. At the lower end of the cylinder is shown the cylinder head 38, with a stufling box having the gland 39.

In the cylinder20 reciprocates the piston 42, that has formed therewith the circumferential port 43, which latter connects with A piston rod 48 extends from the lower end of the piston 42 and passes through the stufling box of the lower cylinder head 38. Knurled nuts 49 and 50 are in threaded engagement with the lower end of the piston rod 48, and a spring 51 concentric with the piston rod 48' bears between the cylinder head 38 and the knurled nut 49 to maintain the piston 42 in its normal position shown in the drawings. A piston rod 53 extends from the upper end of the said piston and passes through the stufiing box having the gland 37. At the upper end of the piston rod 53 is connected the eye 54, which latter may be connected to a lever, switch, gear or other element, that in turnis connected to con trolling apparatus of a tank or reservoir and the like for increasing or decreasing the fluid pressure in said tank or reservoir.

To use the invention the piping 21 is connected to a reservoir not shown, or any other apparatus in which the fluid pressure is to be maintained constant. When the pressure in said reservoir rises above a predetermined pressure the piston 42 is raised in the cylinder 20, by virtue of the pressure brought against the lower end thereof, and when the port 43 registers with the port 23, the fluid in the lower end of the cylinder 22, and in the piping; 21. and said reservoir, enters the piping '30 by way of the longitudinal port 44, the circumferential port 43 and the branch discharge port 23, and blows the whistle 32. -When the pressure in the said reservoir falls below the predetermined pressure, the tension of' the spring 51 pulls down the piston 42 until the circumferential port 43 registers with the lower branch discharge .port 24. Then the pressure of the fluid enters the ports 44, 43, 24, 22 and piping 30 'to -also.blow the whistle 32.

The gage- 28 is a supplemental means of indicating the pressure of the fluid in the piping 21 and of regulating the maximum and minimum pressures'at which the signal shall operate. D

As already indicated the eye 54 is connected with the regulating means of the rot means for regulating the controlling apparatus not shown, to maintain the fluid pressure in said tank or reservoir constant.

The invention provides eflicientmeans to blow the whistle, or any other signal that may be substituted therefor, when the pressure in the piping 21 rises either above or falls below a predetermined amount, and therefore provision can be at once made to regulate the pressure of the fluid that is contained in the device connected with the piping '21.

Having described my invention whatv I desire to secure by Letters Patent and claim 1. In an apparatus of the character described the combination of a cylinder having a pair of ports in the wall thereof, a iston in the cylinder having ports extendlng therethrough, the latter ports coacting at one end of the piston stroke with one of the ports of the cylinder and at the other end of the piston stroke with the other port of the cylinder, means to conduct a fluid pres-' sure into the cylinder and against said piston to move it in one direction, means to move the piston in an opposite direction and a Whistle coacting with the ports in the wall of the cylinder.

2. In an apparatus of the character described. the combination of a cylinder, having a pair of ports in the wall thereof, a whistle coact-ing with said ports, a piston in the cylinder having ports formed therewith and therethrough, means to bring a fluid pressure against one end of the piston to move it to uncover the ports of the cylinder, flexible means to move the piston in an opposite direction, the ports of-the piston coacting with the ports of the cylinder, the fluid. pressure in said cylinder blowing said whistle at two different pressures.

a whistle coacting with one of the ports of the cylinder.

4. In an apparatus of the character described the combination of a cylinder, cylinder heads for the cylinder, a longitudinal port in the wall of the cylinder, branch ports extending between the ends of the longitudinal port and the inside of the cylinder, a whistle connected to one of said ports, a piston in the cylinder, a port on the piston coacting with the said branch ports and a second port in the piston extendin from the first ort thereof to one end 0 the piston, apiston rod extending from the piston and passing through one of said heads, a pair of nuts on the end of the piston rod outside of the cylinder, a spring around the piston rod bearing between its cylinder head and one of said nuts, and piping connected to the cylinder to bring fluid pressure against one end of said piston.

Signed at Jersey City in the county of Hudson and State of New Jersey this 11thv day of September, A. D. 1913.

EDWARD W, WOOLLEY.

Witnesses: JAMEs E. WooLLEY, JOHN V. HALL, Jr. 

